Quote:
Originally Posted by Stefan Buda
Werner,
I understand that you intend to make an optical flat with a D/T=18 - way beyond the realm of amateur telescope makers.
You can epoxy two of the discs together and use it as a grinding tool for making a 14" mirror (but not using the third disc - you would need a thicker blank for that).
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What is meant with D/T=18? I WILL find a site that has translations of commonly used acronyms, but what is it?
I would like to cut the disks to 12" and see if I can produce an F4.5 mirror. Or maybe even a 10" one.